package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.exception.CustomException;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper,Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private SetmealDishService setmealDishService;
    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDto
     */
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);
        Long dishId = dishDto.getId();//菜品id
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) ->{
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());
        //保存菜品的口味数据到菜品口味表disn_flavor
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品的基本信息从dish表查
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);
        //查询当前菜品对应的口味信息,从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> lqw = new LambdaQueryWrapper<>();
        lqw.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(lqw);
        dishDto.setFlavors(flavors);
        return dishDto;
    }

    @Transactional
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }

    //删除菜品
    @Transactional
    public R<String> deleteDish(List<Long> ids) {
        //查询菜品状态,看是否能删除
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.in(Dish::getId,ids);
        //lqw.eq(Dish::getStatus,0);
        lqw.eq(Dish::getStatus,1);
        //判断售卖状态
        /*if (dishList == null || dishList.size() == 0){
           return R.error("该菜品在售卖状态,无法删除");
        }*/
        int count1 = this.count(lqw);
        if (count1 > 0){
            return R.error("该菜品在售卖状态,无法删除");
        }

            //判断菜品是否关联套餐
            LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.in(SetmealDish::getDishId,ids);
            int count = setmealDishService.count(queryWrapper);
            if (count > 0){
                return R.error("该菜品关联了套餐,无法删除");
            }
            //没关联,可以删除
            boolean remove = this.removeByIds(ids);
            //删除口味
            LambdaQueryWrapper<DishFlavor> flqw = new LambdaQueryWrapper<>();
            flqw.in(DishFlavor::getDishId,ids);
            dishFlavorService.remove(flqw);
        return R.success("删除成功");
    }
}